His main research interests are behavioural, cognitive and emotional disorders in people with severe intellectual disability, genetic syndromes and autism spectrum conditions.

Chair of the Cornelia de Lange Syndrome Foundation (UK and Ireland) Scientific and Professional Advisory Committee and member of the Professional and Clinical Advisory Committee for the Smith-Magenis Foundation and the Prader-Willi Syndrome Association Scientific Advisory Committees. Member of Expert Panel on Challenging and Difficult to Treat Behaviors in Angelman Syndrome (USA). Chair Elect: International Scientific and Professional Advisory Committee. Cornelia de Lange syndrome World Federation. Editorial board of Journal of Applied Research in Intellectual Disability, Autism and Journal on Mental Health Research in Intellectual Disabilities. UK Associate Editor for Journal of Intellectual Disability Research.